Do you mean he is lactose intolerant or has a dairy allergy ?
Those are two different things. Lactose intolerance would more likely to cause diarhhea, cramps etc..that is not an "allergy" but an inability to digest lactose.
Dairy allergy would cause hives etc..A true allergy would cause allergic reactions. Sometimes stomach problems, but mostly hives and other serious side effects.
If it's a dairy allergy check the box to see if it lists milk, whey, casein in the ingredients.
at 9:37 PM on Jan. 4, 2009